/**
 * #      669
 * 名称   修剪二叉搜索树
 * 链接   https://leetcode-cn.com/problems/trim-a-binary-search-tree
 * 题解   [209](https://leetcode-cn.com/problems/trim-a-binary-search-tree/solution)
 * 通过率 67.0%
 * 难道   中等
 */

